Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / gpu / drm / rcar-du / rcar_du_lvdscon.c

diff --git a/kernel/drivers/gpu/drm/rcar-du/rcar_du_lvdscon.c b/kernel/drivers/gpu/drm/rcar-du/rcar_du_lvdscon.c
new file mode 100644 (file)
index 0000000..0c43032
--- /dev/null
+++ b/kernel/drivers/gpu/drm/rcar-du/rcar_du_lvdscon.c
@@ -0,0 +1,135 @@
+/*
+ * rcar_du_lvdscon.c  --  R-Car Display Unit LVDS Connector
+ *
+ * Copyright (C) 2013-2014 Renesas Electronics Corporation
+ *
+ * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <drm/drmP.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_crtc_helper.h>
+
+#include <video/display_timing.h>
+#include <video/of_display_timing.h>
+#include <video/videomode.h>
+
+#include "rcar_du_drv.h"
+#include "rcar_du_encoder.h"
+#include "rcar_du_kms.h"
+#include "rcar_du_lvdscon.h"
+
+struct rcar_du_lvds_connector {
+       struct rcar_du_connector connector;
+
+       struct {
+               unsigned int width_mm;          /* Panel width in mm */
+               unsigned int height_mm;         /* Panel height in mm */
+               struct videomode mode;
+       } panel;
+};
+
+#define to_rcar_lvds_connector(c) \
+       container_of(c, struct rcar_du_lvds_connector, connector.connector)
+
+static int rcar_du_lvds_connector_get_modes(struct drm_connector *connector)
+{
+       struct rcar_du_lvds_connector *lvdscon =
+               to_rcar_lvds_connector(connector);
+       struct drm_display_mode *mode;
+
+       mode = drm_mode_create(connector->dev);
+       if (mode == NULL)
+               return 0;
+
+       mode->type = DRM_MODE_TYPE_PREFERRED | DRM_MODE_TYPE_DRIVER;
+
+       drm_display_mode_from_videomode(&lvdscon->panel.mode, mode);
+
+       drm_mode_probed_add(connector, mode);
+
+       return 1;
+}
+
+static const struct drm_connector_helper_funcs connector_helper_funcs = {
+       .get_modes = rcar_du_lvds_connector_get_modes,
+       .best_encoder = rcar_du_connector_best_encoder,
+};
+
+static void rcar_du_lvds_connector_destroy(struct drm_connector *connector)
+{
+       drm_connector_unregister(connector);
+       drm_connector_cleanup(connector);
+}
+
+static enum drm_connector_status
+rcar_du_lvds_connector_detect(struct drm_connector *connector, bool force)
+{
+       return connector_status_connected;
+}
+
+static const struct drm_connector_funcs connector_funcs = {
+       .dpms = drm_atomic_helper_connector_dpms,
+       .reset = drm_atomic_helper_connector_reset,
+       .detect = rcar_du_lvds_connector_detect,
+       .fill_modes = drm_helper_probe_single_connector_modes,
+       .destroy = rcar_du_lvds_connector_destroy,
+       .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+       .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+};
+
+int rcar_du_lvds_connector_init(struct rcar_du_device *rcdu,
+                               struct rcar_du_encoder *renc,
+                               /* TODO const */ struct device_node *np)
+{
+       struct drm_encoder *encoder = rcar_encoder_to_drm_encoder(renc);
+       struct rcar_du_lvds_connector *lvdscon;
+       struct drm_connector *connector;
+       struct display_timing timing;
+       int ret;
+
+       lvdscon = devm_kzalloc(rcdu->dev, sizeof(*lvdscon), GFP_KERNEL);
+       if (lvdscon == NULL)
+               return -ENOMEM;
+
+       ret = of_get_display_timing(np, "panel-timing", &timing);
+       if (ret < 0)
+               return ret;
+
+       videomode_from_timing(&timing, &lvdscon->panel.mode);
+
+       of_property_read_u32(np, "width-mm", &lvdscon->panel.width_mm);
+       of_property_read_u32(np, "height-mm", &lvdscon->panel.height_mm);
+
+       connector = &lvdscon->connector.connector;
+       connector->display_info.width_mm = lvdscon->panel.width_mm;
+       connector->display_info.height_mm = lvdscon->panel.height_mm;
+
+       ret = drm_connector_init(rcdu->ddev, connector, &connector_funcs,
+                                DRM_MODE_CONNECTOR_LVDS);
+       if (ret < 0)
+               return ret;
+
+       drm_connector_helper_add(connector, &connector_helper_funcs);
+       ret = drm_connector_register(connector);
+       if (ret < 0)
+               return ret;
+
+       connector->dpms = DRM_MODE_DPMS_OFF;
+       drm_object_property_set_value(&connector->base,
+               rcdu->ddev->mode_config.dpms_property, DRM_MODE_DPMS_OFF);
+
+       ret = drm_mode_connector_attach_encoder(connector, encoder);
+       if (ret < 0)
+               return ret;
+
+       lvdscon->connector.encoder = renc;
+
+       return 0;
+}